接口描述:
valueOf()
傳回一個Integer對象持有指定的原始值
parseInt()
此方法用于擷取某個字元串的原始資料類型
說白了,Integer.valueOf(String)是将String轉化為Integer對象
Integer.parseInt(String)是将String轉化為int
直接上代碼:
package helloproject;
public class helloworld {
public static void main(String[] args) {
Integer a = 10;
System.out.println(a.compareTo(11));
System.out.println(a.compareTo(10));
System.out.println(a.compareTo(9));
System.out.println(a.valueOf(1112));
System.out.println(a.valueOf(10));
System.out.println(a.valueOf("112"));
System.out.println(a.parseInt("10"));
System.out.println(a.parseInt("11"));
boolean r1 = a.valueOf("112") instanceof Integer;
int kk = a.parseInt("112");
boolean r2 = a instanceof Integer;
System.out.println(r1);
System.out.println(r2);
}
}
運作結果:
-1
0
1
1112
10
112
10
11
true
true